Related Interests. Ac Power; Hertz; Relay; reference SEPED EN b Sepam series 80 Modbus communication users manual. Sepam range Panorama of Sepam applications 1 The Sepam range of protection relays is designed for all protection applications on mediumvoltage public and industrial Sepam series 40 includes 13 types of Sepam. One type of Sepam is dedicated to one application. One type of Sepam is dedicated to one application.